I was asked to make a masterpost on websites like Codecademy, so I’ve tried to compile a list of the best (and mostly free!!). In no particular order:
I couldn’t not include Codecademy! Just in case you haven’t checked it out, it’s pretty neat. It has courses for learning languages and web developer skills.
Languages: Python, Ruby, Java, PHP, jQuery, JavaScript, HTML/CSS
Extras: Git, SQL, Command Line, AngularJS, Ruby on Rails
This is pretty similar to Codecademy with the in-browser coding and such. It also has additional features like teaching videos. A good introduction to programming languages.
Languages: Python, Ruby, Javascript, HTML/CSS
Extra: iOS development with Objective-C or Swift, Git, SQL
Has tutorials followed by mini challenges based on the concepts you’ve just learnt! It also has some reference pages called “Learn x by Example”. Looks pretty good.
Languages: Python, Java, Ruby, HTML/CSS
Extra: Algorithms, Mathematics, + a bunch of premium membership stuff
A set of related websites (see below) which have mini tutorials on language concepts followed by mini challenges, similar to Learnaroo.
Basically, it turns learning to code into a game! As you move through the levels, new concepts are introduced, so the code you need to write to play the game gets harder.
Languages: Python, Java, JavaScript, CoffeeScript, Clojure, Lua
Similar idea to Code Combat, but a little more advanced.
Languages: Python, Java, Ruby, C, C++, C#, Haskell, VB … there’s actually loads it supports.
This is more for ‘training’ with a language you already know. It offers plenty of practice through challenges, so it’s really good for improving your coding skills.
Languages: Python, Ruby, Java, C#, Haskell, JavaScript, CoffeeScript, Clojure
This offers some video tutorials and challenges for a few languages, plus special courses on specific algorithms and bootcamp/interview prep. You need a premium membership for quite a lot of things, though (e.g. I don’t think you can watch any of the videos with a free membership).
Languages: Python, Ruby, JavaScript
Extras: Algorithms, Bootcamp Prep, Job Interview Prep
Mini tutorials followed by mini challenges. Has a number of courses on the languages below!
Languages: HTML/CSS, jQuery, JavaScript
Extras: Git, Algorithms, + a bunch of projects to complete
Has courses to learn various languages through doing little exercises/challenges in the browser, similar to previous examples. Also has ‘zones’ for more languages, where you can find challenges, example code and projects people have shared.
Languages: Python, Java, C++, C#, PHP, jQuery
Only offers Python, but I still think it’s really great. You move from level to level, getting challenges which are gradually trickier. Learn by doing!
12. Rails for Zombies [x]
For people who already know a bit of Ruby, but nothing about Ruby on Rails! Each level begins with a short video followed by interactive challenges where you program Rails in the browser.
That’s all (for now!) Hope this is helpful! (ノ^∇^)ノ゚